Question 1 :
The number of moles of water in 488 g <img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ea7fdb5a3d2442ab829353d"> are:
Question 3 :
If true enter $1$, else enter $0$.<br/>A decinormal solution is $\dfrac{1}{10}\ N$.
Question 5 :
An aqueous solution of concentrated hydrobromic acid contains $48\%$ $HBr$ by mass. If the density of the solution is $1.50$ g/mL, what is its concentration?<br>
Question 6 :
The group in which all the elements do not have same number electrons in their valence shell is :
Question 7 :
An element has atomic number 15. Its valence electrons, group number and valency are respectively 
Question 8 :
Which of the following sets of atomic numbers corresponds to the atomic numbers of inert gases belonging to periods which contain 4d and 5d transition series?
Question 9 :
Which of the following phenomenon will occur when two atoms of same spin will react?
Question 10 :
$0.7\ g$ of $Na_{2}CO_{3}. xH_{2}O$ is dissolved in $100\ ml, 20\ ml$ of which required $19.8\ ml$ of $0.1\ N\ HCl$. The value of $x$ is:
Question 11 :
The valency of Cr in the complex $\left[ \mathrm { Cr } \left( \mathrm { H } _ { 2 } \mathrm { O } \right) _ { 4 } \mathrm { Cl } _ { 2 } \right] ^ { + }$
Question 12 :
Energy of the electron in hydrogen in its first orbit is:
Question 13 :
The total energy of the electron revolving around the nucleus is:
Question 14 :
If r is radius of first orbit, the radius of nth orbit of the H atom will be :
Question 16 :
An electron in a hydrogen atom in its ground state absorbs energy equal to the ionization energy of $Li<br/>^{{\text{ + 2}}} <br/>$. The wavelength of the emitted electron is:<br/>
Question 17 :
The quantum number n of the state finally populated in $He^{+}$ ions is <br/>
Question 18 :
The exhausted Permutit is generally regenerated by percolating through it a solution of:
Question 19 :
Hydrogen produced in contact with substance which is to be reduced is:
Question 21 :
Hydrogen gas is prepared in the laboratory by reacting dilute $HCl$ with granulated zinc. Following reaction takes place:<br>$Zn + 2HCl \rightarrow ZnCl_2 + H_2$<br>What would be the volume of hydrogen gas is liberated at STP when 32.65 g of zinc reacts with $HCl$?
Question 25 :
Among the following molecules<br> (i) {tex} \operatorname { XeO } _ { 3 } {/tex} (ii) {tex} \operatorname { XeOF } _ { 4 } {/tex} (iii) {tex} \operatorname { XeF } _ { 6 } {/tex} <br>Those having same number of lone pairs on {tex}\mathrm{Xe}{/tex} are
Question 27 :
Aluminium is extracted from alumina {tex} \left( \mathrm { Al } _ { 2 } \mathrm { O } _ { 3 } \right) {/tex} by electrolysis of a molten mixture of:
Question 29 :
How many structures of {tex} \mathrm { C } _ { 6 } \mathrm { H } _ { 14 } {/tex} are possible-
Question 31 :
Which of the following sodium compound/compounds are formed when an organic compound containing both nitrogen and sulphur is fused with sodium?
Question 36 :
Choose the correct answer among the alternatives given :<br>Classify the following compounds as primary, secondary and tertiary halides.<br>(i) 1-Bromobut-2-ene<br>(ii) 4-Bromopent.2-ene<br>(iii) 2-Bromo-2-methylpropane<br>
Question 41 :
Propane is obtained from propene, by which of the following methods [CBSE PMT 2001; AFMC 2001]
Question 43 :
The only alcohol that can be prepared by the indirect hydration of alkene is [AFMC 2005]
Question 44 :
Among the following free radical bromination reactions, select those in which {tex} 2 ^ { \circ } {/tex} halide is the major product<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc690b8701466b65e5ebf5"><br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5dfc690e8701466b65e5ebf7">
Question 46 :
Which of the following polymer can be formed by using the following monomer unit?<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/NEET/5ef6db06292c7b4b3122808c"><br>
Question 47 :
Number of electrons present in {tex} 10 \mathrm { g } {/tex} of {tex} \mathrm { D } _ { 2 } \mathrm { O } {/tex} is
Question 48 :
Main chemical change during roasting of {tex} \mathrm { CuFeS } _ { 2 ^ { - } } {/tex}
Question 50 :
The product of oxidation of {tex} I ^ { - } {/tex} with {tex} \mathrm { MnO } _ { 4 } ^ { - } {/tex} in alkaline medium is :-